Monday, 21 Sep 2020

UK heatwave forecast: 40C Spanish plume to blast Britain as ‘high fire risk’ alert issued

Iberia has issued several heatwave warnings over recent days, with temperatures in Spain and Portugal surging into the high 30s and even up to 40C in some parts. Forecaster Netweather wrote: “Very high fire risk for Spain and as the Iberia heatwave continues, temperatures are set to rise further on Thursday, up to 40C. That same air reaches the UK on Friday with 32C+ forecast for SE.”

The forecaster said this same searing plume of air is quickly making its way through Europe and will be “pulled right up through the UK, peaking on Friday”.

Temperature maps from WXCHARTS also show hot air sweeping northwards over the next two days.

Netweather noted Britain will begin to feel the scorching weather on Thursday, sending temperatures into the high 20s, with the warm air quickly making its way to northern England later that evening.

Britons will be bracing themselves for a hot and muggy night on Thursday, with thermometers falling slightly to 20C before quickly surging again beyond 30C on Friday, with the mercury peaking at a sweltering 33C in London.

Scots will also be able to enjoy temperatures ranging from low to mid-20s, which could be as high as 25C in Glasgow.

And conditions are expected to be even hotter in Wales as Cardiff braces for temperatures to hit 28C.

Netweather explained the metrics behind the plume of scorching air that will sweep across the UK over the next 48-hours.

The forecaster said: “Iberia currently has Heatwave warnings with temperatures inland for Spain and Portugal in the high 30s, even up to 40C. This very warm air will be pulled right up through the UK, peaking on Friday.

“Thursday looks warm too for the southern half of the UK with temperatures into the mid, even high 20C.

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“The warmth reaches into northern England for Thursday evening. Jersey could reach 30C.

“It stays warm overnight, London moving from 27C by day only down to 20C overnight before temperatures reach into the low 30s on Friday.

“Most of the UK will see temperatures over 20C on Friday with Greater London and Home Counties most likely to see 33C and inland southern and central England into the low 30C also Manchester reaching 30C.

“Scotland will see low to mid 20s with 25C for Glasgow. Wales in the mid to high 20s, Cardiff up to 28C. There will be a brisk southeasterly wind over much of Britain.

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“Northern Ireland keeps lighter southerly winds and southwest England and Wales will have a light southwesterly wind.

“So, if you are thinking of heading to the beach in the heat and sunshine, it could be blustery.”

But Netweather warned the weather could begin to turn on Friday evening, with rain in eastern parts of England.

Continuing its outlook for Friday, Netweather said: “A warm and muggy evening for eastern England until the cold front moves through with its showers.”

But the forecaster warned: “Saturday won’t be as hot but still warm for southeast Britain with temperatures in the mid 20s and a westerly breeze over the UK.

“Fine for most, just a few showers from the west.

“Sunday into Monday looks more unsettled and showery in the south with temperatures across the UK back to the teens and low 20s mark.”

The Met Office provided a similar outlook from Thursday through to the weekend, beginning with sustained outbreaks of sunshine, getting increasingly hot on Friday but also warning of a risk of thunderstorms in the east as the day progresses.

The forecaster said for Thursday: “Rain in the west and northwest will move across much of Scotland, heaviest in the west but easing later. Elsewhere turning increasingly sunny and warm with light southerly winds.”

The Met Office also wrote for its outlook for Friday and Saturday: “Hot across England and Wales on Friday, although isolated thunderstorms may develop in the east later.

“Fresher conditions extending nationwide for the weekend with some showers, mainly in the north.”

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